Jonas Holm

Senior Associate, Member of the Finnish Bar, M.Sc. (Econ.)

Services

  1. Environment, Energy & Green Transition

Contact details

I advise clients on energy law matters, industrial and infrastructure projects, and contractual issues related to these sectors.

A key part of my work is an interdisciplinary approach and understanding the diverse forces that shape the landscape in which companies operate. Businesses that understand the regulatory, political, economic and commercial realities of an increasingly interconnected world gain a competitive advantage. I provide holistic and strategic legal advice that goes beyond regulatory considerations by incorporating interdisciplinary and commercial insights.

I am currently pursuing doctoral studies in energy law. In addition to my law degree, I hold a Master’s degree in economics, which enables me to bridge legal analysis with commercial strategy.

Before joining Castrén & Snellman, I advised both Finnish and international industrial companies, as well as private equity sponsors, at another leading law firm. My experience spans complex transactions and regulatory frameworks, always with a focus on delivering pragmatic, business-oriented solutions. This multidisciplinary foundation allows me to provide specific advice to diverse stakeholders and to help our clients build sustainable success stories.

Latest references

Delta Capacity – Acquisition of BESS Project
We acted as Finnish legal advisor to Delta Capacity in connection with its acquisition of the ready-to-build Karppio battery energy storage system (BESS) project from Helios Nordic Energy. The acquisition was made and the project will be implemented together with Strioga Family Foundation. The Karppio BESS project is located in Teuva, Finland, and has a capacity of 125 MW / 300 MWh. Delta Capacity will lead the remaining development of the project through to commissioning, planned for 2027, and will serve as long-term asset manager. Delta Capacity is a Swiss-based developer of utility scale battery storage systems. The acquisition adds to Delta Capacity’s growing Nordic portfolio. 
Case published 20.7.2026
Oomi Solar – Sale of a Solar Power Plant and Battery Energy Storage Project
We advised Oomi Solar Oy on the sale of a solar power park and battery energy storage project to Tuulipolar Oy. The transaction concerned a 24 MWp solar power plant and a 36 MW / 70 MWh battery energy storage system (BESS) to be constructed in Tornio. Tuulipolar Oy will act as the owner and operator of the plant, while Oomi Solar Oy will be responsible for its design and construction. The project will form the world’s northernmost industrial hybrid power plant, contributing to Finland’s green energy transition by increasing renewable energy production and electricity storage capacity in Northern Finland. The hybrid solution enables optimization of production as well as active participation in electricity markets and reserve services, improving the project’s profitability and supporting the balance of the electricity system year-round. Electricity production from the hybrid plant is expected to begin in 2028. Oomi Solar Oy is a Finnish renewable energy expert with experience from nearly 200 MW of installed solar capacity. The company helps businesses and communities accelerate the green transition by offering comprehensive solutions, including solar power plants, energy storage systems, and related lifecycle services from project development to maintenance. Oomi Solar Oy employs more than 20 energy professionals and delivers solar power projects across Finland. The company’s vision is to be Finland’s most desired partner for solar energy and energy solutions.
Case published 5.6.2026
Nscale – Data centre project
Castrén & Snellman advised Nscale, a European AI infrastructure company, in connection with its planned data centre project in Harjavalta, Finland. The facility will be located in the Sievari industrial area. Castrén & Snellman’s advisory role encompassed the negotiation and execution of a site securing and development agreement (SSDA) with Fortum, as well as the preliminary land sale process for the Sievari site with the Town of Harjavalta. Under the SSDA, Fortum supports the advancement of Nscale’s project development, including grid connection design and permitting.
Case published 15.4.2026
Downing – Acquisition of the entire share capital of Tornionlaakson Voima
We advised UK-based investment company Downing in its acquisition of the entire share capital of Tornionlaakson Voima Oy. Tornionlaakson Voima owns three hydropower plants in the Tengeliönjoki river system – the Portimokoski power plants in Ylitornio, the Jolmankoski power plants in Raanujärvi and the Kaaranneskoski power plants in Sirkkakoski. The power plants produce a total of approx. 45 gigawatt-hours of electricity per year. Tornionlaakson Voima’s daily operations will continue normally, and the transaction will not affect customers. The consummation of the transaction is subject to the approval of the Ministry of Economic Affairs and Employment. Downing has over 35 years’ experience in providing a wide range of investment solutions to the needs of institutional investors, advisers and retail investors. The company manages over £2 billion in assets in both the private and public markets and its current hydro power portfolio includes approx. 50 hydro power plants in the Nordics. 
Case published 27.3.2026
Brookfield – EUR 1 billion holdco financing for DayOne Data Centers
We advised a leading global investment firm Brookfield, alongside a global sovereign wealth investor, on the Finnish law aspects of a EUR 1 billion holdco financing for DayOne Data Centers, a Singapore-headquartered developer and operator of hyperscale data centres. Structured as a seven-year secured holdco financing facility of €500 million, expandable to €1 billion – and secured by DayOne’s Finland platform – the financing will support the rollout of hyperscale developments in Lahti and Kouvola, providing nearly 300MW of planned capacity across Finland. The proceeds will also support DayOne’s global expansion across the EU and APAC, with flexibility to allocate to other key growth markets as required.
Case published 29.1.2026
NoHo Partners – EUR 50 million secured notes and EUR 97 million senior secured facilities agreement
We advised NoHo Partners Plc on the issuance of EUR 50 million senior secured floating rate notes. The notes have a tenor of four years and mature on 10 September 2030. The notes bear interest at a rate of three-month EURIBOR plus a margin of 4.375 per cent. per annum. The notes were allocated to a mix of domestic and international investors. We also advised NoHo Partners on the negotiation of its new senior facilities agreement. The facilities agreement comprises a EUR 60,000,000 term loan facility, a EUR 10,000,000 capex facility and a EUR 27,000,000 revolving credit facility. “We are delighted by the interest investors have shown in the company’s Notes, which reflects confidence in our strategy. The successful issuance of the Notes, together with the new loan agreement, extends the maturity profile of our financing and enables the company to continue executing its growth strategy going forward. I would like to thank all investors for their participation, as well as our partner bank for the excellent execution of the Notes issuance”, says Jarno Suominen, CEO of NoHo Partners. OP Corporate Bank plc acted as the sole lead manager and bookrunner for the issue of the notes. NoHo Partners Plc is a Finnish group established in 1996, and it specialises in restaurant services being the creative innovator of the Northern European restaurant market. The company was listed in Nasdaq Helsinki in 2013 becoming the first Finnish listed restaurant company, and it has continued to grow strongly throughout its history. NoHo Partners’ vision is to be the leading restaurant operator in Northern Europe.
Case published 4.9.2026
Topfoods – Acquisition of Delice Plus
We advised Topfoods Oy, a Triton-backed Geia Group company, on its acquisition of Oy Delice Plus Ab, a Finnish supplier of cakes and pastries. Through the acquisition, Topfoods strengthens its retail business and further reinforces its position in the cakes and pastries segment. Founded in 2008, Topfoods supplies selected food products to professional kitchens, the retail sector, and the food industry. 
Case published 4.9.2026
Deka Immobilien – Acquisition of a prime logistics property
We advised Deka Immobilien on its acquisition of a prime logistics property located at Turvalaaksonkuja 4, Vantaa, for the Deka-ImmobilienEuropa open-ended real estate fund. The property is situated within the Aviapolis logistics cluster, which is Finland’s leading logistics hub, benefiting from its location next to Helsinki Airport and its connections to the country’s main transport routes. Completed in 2022, the modern property comprises 32,947 sqm of lettable space and is fully let on a long-term basis to Barona Varastopalvelut Oy. The tenant is a Finnish 3PL provider offering warehousing and e-commerce logistics services to companies in Finland and internationally and uses the property as its central logistics hub. The property has achieved a BREEAM International New Construction rating of Excellent and an EPC rating of A, and it features photovoltaic and geothermal systems, among other things.
Case published 3.9.2026

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